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Finding the Fourth Proportional to 55,291.40, 82,920.90 and 19,748.60

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Solution

The fourth proportional to 55,291.40, 82,920.90 and 19,748.60 is: 29,617.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,291.40 : 82,920.90 = 19,748.60 : x
  2. Step 2: Convert to fraction form
    55,291.40/82,920.90 = 19,748.60/x
  3. Step 3: Cross multiply
    55,291.40x = 82,920.90 × 19,748.60
  4. Step 4: Simplify right side
    55,291.40x = 1,637,571,685.74
  5. Step 5: Solve for x
    x = 1,637,571,685.74/55,291.40
  6. Step 6: Final answer
    x = 29,617.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.